Yes. Many of them are quite large. We have a 25' travel tailer and F150 and had no problem fitting into our site.

Site sizes vary. I would call the office at the campground to know for sure. We definitely saw some larger rigs that looked like they were in the 30-ish foot range. The site we were in (184 Juniper Loop) would've fit you in, I'm pretty sure.

Yes. There are many pull through sites are enough.

Yes! We stayed there with a 25' trailer and full size truck and had plenty of room. Most sites are those little C-shaped pull-through loops off the main road (look at the photos to see what I mean) and while you may have to park the truck and trailer at different angles you should have plenty of length.